Balls

304 Products in this selection
Combined category including sub-categories of balls. These include rubber, metallic, plastic, bored, inspection, glass, ceramic, tooling, fixture, and checking.
Small Parts & Bearings

Additional resources:
Balls Master Catalogue PDF
AFBMA and ISO Ball Grades

A more comprehensive listing may be found on the MBA Minibearings main store at Balls.
Diameter (D) Material Precision Hardness Properties Colour Indicative
Image
Diameter (D)
2.779
mm
+/- 0.00254
(Equiv. 0.109 in.)
Material
Synthetic Ruby
Precision
AFBMA Grade 25
Hardness
9 Mohs
Properties
Extreme hardness and wear resistance
Colour
Ruby
Ceramic Balls - 2.779 mm Synthetic Ruby - AFBMA Grade 25 Ball
Material: Synthetic Ruby    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00278-RY-G25 (PK-2) Ceramic Balls - 2.779 mm Synthetic Ruby - AFBMA Grade 25 Ball
5 units (10 pcs) Available Now | Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity
$19.32 AUD
$32.22 AUD $19.32 AUD
Per 2
Diameter (D) Material Precision Hardness Indicative
Image
Diameter (D)
2.779
mm
+/- 0.00254
(Equiv. 0.109 in.)
Material
Synthetic Ruby
Precision
AFBMA Grade 25
Hardness
9 Mohs
Ceramic Balls - 2.779 mm Synthetic Ruby - AFBMA Grade 25 Ball
Material: Synthetic Ruby    Properties: Extreme hardness and wear resistance    Colour: Ruby    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00278-RY-G25 (PK-2) Ceramic Balls - 2.779 mm Synthetic Ruby - AFBMA Grade 25 Ball
5 units (10 pcs) Available Now | Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity
$19.32 AUD
$32.22 AUD $19.32 AUD
Per 2
Diameter (D)
2.779
mm
+/- 0.00254
(Equiv. 0.109 in.)
Material
Synthetic Sapphire
Precision
AFBMA Grade 25
Hardness
9 Mohs
Properties
Extreme hardness and wear resistance
Colour
Transparent
Ceramic Balls - 2.779 mm Synthetic Sapphire - AFBMA Grade 25 Ball
Material: Synthetic Sapphire    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00278-SP-G25 (PK-2) Ceramic Balls - 2.779 mm Synthetic Sapphire - AFBMA Grade 25 Ball
5 units (10 pcs) Available Now | Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity
$19.32 AUD
$23.18 AUD $19.32 AUD
Per 2
Diameter (D)
2.779
mm
+/- 0.00254
(Equiv. 0.109 in.)
Material
Synthetic Sapphire
Precision
AFBMA Grade 25
Hardness
9 Mohs
Ceramic Balls - 2.779 mm Synthetic Sapphire - AFBMA Grade 25 Ball
Material: Synthetic Sapphire    Properties: Extreme hardness and wear resistance    Colour: Transparent    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00278-SP-G25 (PK-2) Ceramic Balls - 2.779 mm Synthetic Sapphire - AFBMA Grade 25 Ball
5 units (10 pcs) Available Now | Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity
$19.32 AUD
$23.18 AUD $19.32 AUD
Per 2
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Si3N4
Precision
AFBMA Grade 10
Hardness
1580 kg/mm.sq
Properties
Good wear resistance and thermal resistance
Colour
Grey
Ceramic Balls - 3 mm Si3N4 - AFBMA Grade 10 Silicon Nitride Ball
Material: Si3N4    Specific Gravity: 3.29   
Category: Balls - Ceramic - Silicon Nitride
Part Number: BL-00300-SN-G10 (PK-10) Ceramic Balls - 3 mm Si3N4 - AFBMA Grade 10 Silicon Nitride Ball
120 units (1200 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$6.77 AUD
$6.77 AUD
Per 10
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Si3N4
Precision
AFBMA Grade 10
Hardness
1580 kg/mm.sq
Ceramic Balls - 3 mm Si3N4 - AFBMA Grade 10 Silicon Nitride Ball
Material: Si3N4    Properties: Good wear resistance and thermal resistance    Colour: Grey    Specific Gravity: 3.29   
Category: Balls - Ceramic - Silicon Nitride
Part Number: BL-00300-SN-G10 (PK-10) Ceramic Balls - 3 mm Si3N4 - AFBMA Grade 10 Silicon Nitride Ball
120 units (1200 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$6.77 AUD
$6.77 AUD
Per 10
View the product page first if you are unsure.
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
ZRO2
Precision
AFBMA Grade 25
Hardness
1300 kg/mm.sq
Properties
Good wear resistance and thermal resistance
Colour
Off White
Ceramic Balls - 3 mm ZRO2 - AFBMA Grade 25 Zirconia Ball
Material: ZRO2    Specific Gravity: 6.02   
Category: Balls - Ceramic - Zirconia
Part Number: BL-00300-ZR-G25 (PK-20) Ceramic Balls - 3 mm ZRO2 - AFBMA Grade 25 Zirconia Ball
4 units (80 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$8.50 AUD
$8.50 AUD
Per 20
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
ZRO2
Precision
AFBMA Grade 25
Hardness
1300 kg/mm.sq
Ceramic Balls - 3 mm ZRO2 - AFBMA Grade 25 Zirconia Ball
Material: ZRO2    Properties: Good wear resistance and thermal resistance    Colour: Off White    Specific Gravity: 6.02   
Category: Balls - Ceramic - Zirconia
Part Number: BL-00300-ZR-G25 (PK-20) Ceramic Balls - 3 mm ZRO2 - AFBMA Grade 25 Zirconia Ball
4 units (80 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$8.50 AUD
$8.50 AUD
Per 20
View the product page first if you are unsure.
Diameter (D)
3.00
mm
+/- 0.051
(Equiv. 0.118 in.)
Material
Acrylic
Precision
Grade 3
Hardness
132 Rockwell R
Properties
Resistance to weather and sunlight
Colour
Water clear transparent
Plastic Balls - 3 mm Acrylic - Grade 3 Ball
Material: Acrylic    Specific Gravity: 1.19   
Category: Balls - Plastic - Acrylic
Part Number: BL-00300-ACR (PK-100) Plastic Balls - 3 mm Acrylic - Grade 3 Ball
63 units (6300 pcs) Available Now | Further orders can be expected around Fri, Sep 18, 2026
$2.95 AUD
$8.13 AUD $2.95 AUD
Per 100
Diameter (D)
3.00
mm
+/- 0.051
(Equiv. 0.118 in.)
Material
Acrylic
Precision
Grade 3
Hardness
132 Rockwell R
Plastic Balls - 3 mm Acrylic - Grade 3 Ball
Material: Acrylic    Properties: Resistance to weather and sunlight    Colour: Water clear transparent    Specific Gravity: 1.19   
Category: Balls - Plastic - Acrylic
Part Number: BL-00300-ACR (PK-100) Plastic Balls - 3 mm Acrylic - Grade 3 Ball
63 units (6300 pcs) Available Now | Further orders can be expected around Fri, Sep 18, 2026
$2.95 AUD
$8.13 AUD $2.95 AUD
Per 100
View the product page first if you are unsure.
Diameter (D)
3.00
mm
+/- 0.051
(Equiv. 0.118 in.)
Material
Santoprene Rubber
Precision
Grade II
Hardness
Shore 40D
Properties
Excellent for liquid level float applications.
Colour
Beige
Rubber Balls - 3 mm Santoprene Rubber - Grade II Santoprene 40D Ball
Material: Santoprene Rubber    Specific Gravity: 0.95   
Category: Balls - Rubber - Santoprene 40D
Part Number: BL-00300-R40D (PK-1000) Rubber Balls - 3 mm Santoprene Rubber - Grade II Santoprene 40D Ball
473 units (473000 pcs) Available Now | Item Discontinued - Up to 473 may be ordered online. No backorders. Please contact us if you need a larger quantity
$25.00 AUD
$30.00 AUD $25.00 AUD
Per 1000
Diameter (D)
3.00
mm
+/- 0.051
(Equiv. 0.118 in.)
Material
Santoprene Rubber
Precision
Grade II
Hardness
Shore 40D
Rubber Balls - 3 mm Santoprene Rubber - Grade II Santoprene 40D Ball
Material: Santoprene Rubber    Properties: Excellent for liquid level float applications.    Colour: Beige    Specific Gravity: 0.95   
Category: Balls - Rubber - Santoprene 40D
Part Number: BL-00300-R40D (PK-1000) Rubber Balls - 3 mm Santoprene Rubber - Grade II Santoprene 40D Ball
473 units (473000 pcs) Available Now | Item Discontinued - Up to 473 may be ordered online. No backorders. Please contact us if you need a larger quantity
$25.00 AUD
$30.00 AUD $25.00 AUD
Per 1000
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Fused Silica
Precision
AFBMA Grade 25
Hardness
500 kg / sq.cm
Colour
Translucent
Glass Balls - 3 mm Fused Silica - AFBMA Grade 25 Ball
Material: Fused Silica    Specific Gravity: 2.203   
Category: Balls - Glass - Fused Silica
Part Number: BL-00300-FS-G25 (Each) Glass Balls - 3 mm Fused Silica - AFBMA Grade 25 Ball
5 Available Now | Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity
$16.14 AUD
$26.84 AUD $16.14 AUD
Each
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Fused Silica
Precision
AFBMA Grade 25
Hardness
500 kg / sq.cm
Glass Balls - 3 mm Fused Silica - AFBMA Grade 25 Ball
Material: Fused Silica    Colour: Translucent    Specific Gravity: 2.203   
Category: Balls - Glass - Fused Silica
Part Number: BL-00300-FS-G25 (Each) Glass Balls - 3 mm Fused Silica - AFBMA Grade 25 Ball
5 Available Now | Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity
$16.14 AUD
$26.84 AUD $16.14 AUD
Each
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Synthetic Ruby
Precision
AFBMA Grade 25
Hardness
9 Mohs
Properties
Extreme hardness and wear resistance
Colour
Ruby
Ceramic Balls - 3 mm Synthetic Ruby - AFBMA Grade 25 Ball
Material: Synthetic Ruby    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00300-RY-G25 (Each) Ceramic Balls - 3 mm Synthetic Ruby - AFBMA Grade 25 Ball
10 Available Now | Item Discontinued - Up to 10 may be ordered online. No backorders. Please contact us if you need a larger quantity
$9.77 AUD
$11.73 AUD $9.77 AUD
Each
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Synthetic Ruby
Precision
AFBMA Grade 25
Hardness
9 Mohs
Ceramic Balls - 3 mm Synthetic Ruby - AFBMA Grade 25 Ball
Material: Synthetic Ruby    Properties: Extreme hardness and wear resistance    Colour: Ruby    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00300-RY-G25 (Each) Ceramic Balls - 3 mm Synthetic Ruby - AFBMA Grade 25 Ball
10 Available Now | Item Discontinued - Up to 10 may be ordered online. No backorders. Please contact us if you need a larger quantity
$9.77 AUD
$11.73 AUD $9.77 AUD
Each
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Tungsten Carbide
Precision
AFBMA Grade 25
Hardness
91.5 Rockwell A
Properties
Extreme hardness and wear resistance.
Colour
Dull Grey
Metallic Balls - 3 mm Tungsten Carbide - AFBMA Grade 25 Ball
Material: Tungsten Carbide    Specific Gravity: 14.95   
Category: Balls - Metallic - Tungsten Carbide
Part Number: BL-00300-TC-G25 (PK-5) Metallic Balls - 3 mm Tungsten Carbide - AFBMA Grade 25 Ball
18 units (90 pcs) Available Now | Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity
$9.00 AUD
$51.29 AUD $9.00 AUD
Per 5
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
Tungsten Carbide
Precision
AFBMA Grade 25
Hardness
91.5 Rockwell A
Metallic Balls - 3 mm Tungsten Carbide - AFBMA Grade 25 Ball
Material: Tungsten Carbide    Properties: Extreme hardness and wear resistance.    Colour: Dull Grey    Specific Gravity: 14.95   
Category: Balls - Metallic - Tungsten Carbide
Part Number: BL-00300-TC-G25 (PK-5) Metallic Balls - 3 mm Tungsten Carbide - AFBMA Grade 25 Ball
18 units (90 pcs) Available Now | Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity
$9.00 AUD
$51.29 AUD $9.00 AUD
Per 5
Diameter (D)
3.000
mm
+/- 0.01270
(Equiv. 0.118 in.)
Material
Ti-Gr23/Ti-6AL4V-ELI
Precision
ISO 3290 Grade 100
Hardness
35 Rockwell C
Properties
Implant Grade Titanium
Colour
Silver
Metallic Balls - 3 mm Ti-Gr23/Ti-6AL4V-ELI - ISO 3290 Grade 100 Titanium Alloy Ball
Material: Ti-Gr23/Ti-6AL4V-ELI   
Category: Balls - Metallic - Titanium Alloy
Part Number: BL-00300-T23-G100 (PK-10) Metallic Balls - 3 mm Ti-Gr23/Ti-6AL4V-ELI - ISO 3290 Grade 100 Titanium Alloy Ball
61 units (610 pcs) Available Now | Further orders can be expected around Sat, Aug 29, 2026
$3.23 AUD
$3.23 AUD
Per 10
Diameter (D)
3.000
mm
+/- 0.01270
(Equiv. 0.118 in.)
Material
Ti-Gr23/Ti-6AL4V-ELI
Precision
ISO 3290 Grade 100
Hardness
35 Rockwell C
Metallic Balls - 3 mm Ti-Gr23/Ti-6AL4V-ELI - ISO 3290 Grade 100 Titanium Alloy Ball
Material: Ti-Gr23/Ti-6AL4V-ELI    Properties: Implant Grade Titanium    Colour: Silver   
Category: Balls - Metallic - Titanium Alloy
Part Number: BL-00300-T23-G100 (PK-10) Metallic Balls - 3 mm Ti-Gr23/Ti-6AL4V-ELI - ISO 3290 Grade 100 Titanium Alloy Ball
61 units (610 pcs) Available Now | Further orders can be expected around Sat, Aug 29, 2026
$3.23 AUD
$3.23 AUD
Per 10
View the product page first if you are unsure.
Diameter (D)
3.000
mm
+/- 0.01270
(Equiv. 0.118 in.)
Material
304 Stainless
Precision
ISO 3290 Grade 200
Hardness
25-39 Rockwell C
Properties
Low magnetic permeability. Good corrosion resistance
Colour
Silver
Metallic Balls - 3 mm 304 Stainless - ISO 3290 Grade 200 Ball
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Specific Gravity: 7.916   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00300-S4-G200 (PK-200) Metallic Balls - 3 mm 304 Stainless - ISO 3290 Grade 200 Ball
59 units (11800 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$4.86 AUD
$4.86 AUD
Per 200
Diameter (D)
3.000
mm
+/- 0.01270
(Equiv. 0.118 in.)
Material
304 Stainless
Precision
ISO 3290 Grade 200
Hardness
25-39 Rockwell C
Metallic Balls - 3 mm 304 Stainless - ISO 3290 Grade 200 Ball
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Properties: Low magnetic permeability. Good corrosion resistance    Colour: Silver    Specific Gravity: 7.916   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00300-S4-G200 (PK-200) Metallic Balls - 3 mm 304 Stainless - ISO 3290 Grade 200 Ball
59 units (11800 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$4.86 AUD
$4.86 AUD
Per 200
View the product page first if you are unsure.
Diameter (D)
3.000
mm
+/- 0.01270
(Equiv. 0.118 in.)
Material
316 Stainless
Precision
ISO 3290 Grade 200
Hardness
25-39 Rockwell C
Properties
Resistant to severe corrosive conditions
Colour
Silver
Metallic Balls - 3 mm 316 Stainless - ISO 3290 Grade 200 Ball
Material: Stainless Steel 316 (Similar to A4, 18-10)    Specific Gravity: 7.972   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00300-S6-G200 (PK-500) Metallic Balls - 3 mm 316 Stainless - ISO 3290 Grade 200 Ball
10 units (5000 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$6.14 AUD
$6.14 AUD
Per 500
Diameter (D)
3.000
mm
+/- 0.01270
(Equiv. 0.118 in.)
Material
316 Stainless
Precision
ISO 3290 Grade 200
Hardness
25-39 Rockwell C
Metallic Balls - 3 mm 316 Stainless - ISO 3290 Grade 200 Ball
Material: Stainless Steel 316 (Similar to A4, 18-10)    Properties: Resistant to severe corrosive conditions    Colour: Silver    Specific Gravity: 7.972   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00300-S6-G200 (PK-500) Metallic Balls - 3 mm 316 Stainless - ISO 3290 Grade 200 Ball
10 units (5000 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$6.14 AUD
$6.14 AUD
Per 500
View the product page first if you are unsure.
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
440C Stainless
Precision
ISO 3290 Grade 16
Hardness
55-60 Rockwell C
Properties
Commonly used in precision bearings. Corrosion resistant.
Colour
Silver
Metallic Balls - 3 mm 440C Stainless - ISO 3290 Grade 16 Ball
Material: Stainless Steel AISI 440C    Specific Gravity: 7.833   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00300-S440-G16 (PK-100) Metallic Balls - 3 mm 440C Stainless - ISO 3290 Grade 16 Ball
13 units (1300 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$3.68 AUD
$3.68 AUD
Per 100
Diameter (D)
3.000
mm
+/- 0.00254
(Equiv. 0.118 in.)
Material
440C Stainless
Precision
ISO 3290 Grade 16
Hardness
55-60 Rockwell C
Metallic Balls - 3 mm 440C Stainless - ISO 3290 Grade 16 Ball
Material: Stainless Steel AISI 440C    Properties: Commonly used in precision bearings. Corrosion resistant.    Colour: Silver    Specific Gravity: 7.833   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00300-S440-G16 (PK-100) Metallic Balls - 3 mm 440C Stainless - ISO 3290 Grade 16 Ball
13 units (1300 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$3.68 AUD
$3.68 AUD
Per 100
View the product page first if you are unsure.
Diameter (D)
3.000
mm
+ 0.10 / - 0.00
(Equiv. 0.118 in.)
Material
Neodymium

+ 0.00 / - 0.10
Colour
Gold Plated
Metallic Balls - 3 mm Neodymium - - Magnetic Ball
Material: Neodymium   
Category: Balls - Metallic - Magnet
Part Number: BL-00300-MAGN (Each) Metallic Balls - 3 mm Neodymium - - Magnet Ball
Out of Stock | Backorder Now | Orders can be expected around Sun, Aug 09, 2026
$17.86 AUD
$17.86 AUD
Each
Diameter (D)
3.000
mm
+ 0.10 / - 0.00
(Equiv. 0.118 in.)
Material
Neodymium

+ 0.00 / - 0.10
Metallic Balls - 3 mm Neodymium - - Magnetic Ball
Material: Neodymium    Colour: Gold Plated   
Category: Balls - Metallic - Magnet
Part Number: BL-00300-MAGN (Each) Metallic Balls - 3 mm Neodymium - - Magnet Ball
Out of Stock | Backorder Now | Orders can be expected around Sun, Aug 09, 2026
$17.86 AUD
$17.86 AUD
Each
View the product page first if you are unsure.
Diameter (D)
3.000
mm
+ 0.10 / - 0.00
(Equiv. 0.118 in.)
Material
Neodymium N-40

+ 0.00 / - 0.10
Colour
Ni plating
Metallic Balls - 3 mm Neodymium N-40 - - Magnetic Ball
Material: Neodymium N-40   
Category: Balls - Metallic - Magnet
Part Number: BL-00300-MAGN40 (PK-3) Metallic Balls - 3 mm Neodymium N-40 - - Magnet Ball
Out of Stock | Backorder Now | Orders can be expected around Sun, Aug 09, 2026
$103.77 AUD
$103.77 AUD
Per 3
Diameter (D)
3.000
mm
+ 0.10 / - 0.00
(Equiv. 0.118 in.)
Material
Neodymium N-40

+ 0.00 / - 0.10
Metallic Balls - 3 mm Neodymium N-40 - - Magnetic Ball
Material: Neodymium N-40    Colour: Ni plating   
Category: Balls - Metallic - Magnet
Part Number: BL-00300-MAGN40 (PK-3) Metallic Balls - 3 mm Neodymium N-40 - - Magnet Ball
Out of Stock | Backorder Now | Orders can be expected around Sun, Aug 09, 2026
$103.77 AUD
$103.77 AUD
Per 3
View the product page first if you are unsure.
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
SAE52100 Chrome
Precision
AFBMA Grade 25
Hardness
60-70 Rockwell C
Properties
Commonly used in precision bearings.
Colour
Silver
Metallic Balls - 3.175 mm SAE52100 Chrome - AFBMA Grade 25 Ball
Material: Chrome Steel SAE 52100    Specific Gravity: 7.833   
Category: Balls - Metallic - Chrome Steel
Part Number: BL-00318-CH-G25 (PK-50) Metallic Balls - 3.175 mm SAE52100 Chrome - AFBMA Grade 25 Ball
118 units (5900 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$6.14 AUD
$6.14 AUD
Per 50
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
SAE52100 Chrome
Precision
AFBMA Grade 25
Hardness
60-70 Rockwell C
Metallic Balls - 3.175 mm SAE52100 Chrome - AFBMA Grade 25 Ball
Material: Chrome Steel SAE 52100    Properties: Commonly used in precision bearings.    Colour: Silver    Specific Gravity: 7.833   
Category: Balls - Metallic - Chrome Steel
Part Number: BL-00318-CH-G25 (PK-50) Metallic Balls - 3.175 mm SAE52100 Chrome - AFBMA Grade 25 Ball
118 units (5900 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$6.14 AUD
$6.14 AUD
Per 50
View the product page first if you are unsure.
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Si3N4
Precision
AFBMA Grade 25
Hardness
1580 kg/mm.sq
Properties
Good wear resistance and thermal resistance
Colour
Grey
Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 25 Silicon Nitride Ball
Material: Si3N4    Specific Gravity: 3.29   
Category: Balls - Ceramic - Silicon Nitride
Part Number: BL-00318-SN-G25 (PK-100) Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 25 Silicon Nitride Ball
Out of Stock | Backorder Now | Orders can be expected around Fri, Jul 31, 2026
$61.32 AUD
$61.32 AUD
Per 100
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Si3N4
Precision
AFBMA Grade 25
Hardness
1580 kg/mm.sq
Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 25 Silicon Nitride Ball
Material: Si3N4    Properties: Good wear resistance and thermal resistance    Colour: Grey    Specific Gravity: 3.29   
Category: Balls - Ceramic - Silicon Nitride
Part Number: BL-00318-SN-G25 (PK-100) Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 25 Silicon Nitride Ball
Out of Stock | Backorder Now | Orders can be expected around Fri, Jul 31, 2026
$61.32 AUD
$61.32 AUD
Per 100
View the product page first if you are unsure.
Diameter (D)
3.175
mm
+/- 0.01270
(Equiv. 0.125 in.)
Material
Si3N4
Precision
AFBMA Grade 100
Hardness
1580 kg/mm.sq
Properties
Good wear resistance and thermal resistance
Colour
Grey
Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 100 Silicon Nitride Ball
Material: Si3N4    Specific Gravity: 3.29   
Category: Balls - Ceramic - Silicon Nitride
Part Number: BL-00318-SN-G100 (PK-50) Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 100 Silicon Nitride Ball
8 units (400 pcs) Available Now | Item Discontinued - Up to 8 may be ordered online. No backorders. Please contact us if you need a larger quantity
$25.00 AUD
$47.50 AUD $25.00 AUD
Per 50
Diameter (D)
3.175
mm
+/- 0.01270
(Equiv. 0.125 in.)
Material
Si3N4
Precision
AFBMA Grade 100
Hardness
1580 kg/mm.sq
Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 100 Silicon Nitride Ball
Material: Si3N4    Properties: Good wear resistance and thermal resistance    Colour: Grey    Specific Gravity: 3.29   
Category: Balls - Ceramic - Silicon Nitride
Part Number: BL-00318-SN-G100 (PK-50) Ceramic Balls - 3.175 mm Si3N4 - AFBMA Grade 100 Silicon Nitride Ball
8 units (400 pcs) Available Now | Item Discontinued - Up to 8 may be ordered online. No backorders. Please contact us if you need a larger quantity
$25.00 AUD
$47.50 AUD $25.00 AUD
Per 50
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Synthetic Ruby
Precision
AFBMA Grade 25
Hardness
9 Mohs
Properties
Extreme hardness and wear resistance
Colour
Ruby
Ceramic Balls - 3.175 mm Synthetic Ruby - AFBMA Grade 25 Ball
Material: Synthetic Ruby    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00318-RY-G25 (Each) Ceramic Balls - 3.175 mm Synthetic Ruby - AFBMA Grade 25 Ball
6 Available Now | Item Discontinued - Up to 6 may be ordered online. No backorders. Please contact us if you need a larger quantity
$9.77 AUD
$11.73 AUD $9.77 AUD
Each
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Synthetic Ruby
Precision
AFBMA Grade 25
Hardness
9 Mohs
Ceramic Balls - 3.175 mm Synthetic Ruby - AFBMA Grade 25 Ball
Material: Synthetic Ruby    Properties: Extreme hardness and wear resistance    Colour: Ruby    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00318-RY-G25 (Each) Ceramic Balls - 3.175 mm Synthetic Ruby - AFBMA Grade 25 Ball
6 Available Now | Item Discontinued - Up to 6 may be ordered online. No backorders. Please contact us if you need a larger quantity
$9.77 AUD
$11.73 AUD $9.77 AUD
Each
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Synthetic Sapphire
Precision
AFBMA Grade 25
Hardness
9 Mohs
Properties
Extreme hardness and wear resistance
Colour
Transparent
Ceramic Balls - 3.175 mm Synthetic Sapphire - AFBMA Grade 25 Ball
Material: Synthetic Sapphire    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00318-SP-G25 (PK-5) Ceramic Balls - 3.175 mm Synthetic Sapphire - AFBMA Grade 25 Ball
1 pack (5 pcs) Available Now | Further orders can be expected around Fri, Aug 28, 2026
$68.05 AUD
$81.65 AUD $68.05 AUD
Per 5
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Synthetic Sapphire
Precision
AFBMA Grade 25
Hardness
9 Mohs
Ceramic Balls - 3.175 mm Synthetic Sapphire - AFBMA Grade 25 Ball
Material: Synthetic Sapphire    Properties: Extreme hardness and wear resistance    Colour: Transparent    Specific Gravity: 3.98   
Category: Balls - Ceramic - Synthetic
Part Number: BL-00318-SP-G25 (PK-5) Ceramic Balls - 3.175 mm Synthetic Sapphire - AFBMA Grade 25 Ball
1 pack (5 pcs) Available Now | Further orders can be expected around Fri, Aug 28, 2026
$68.05 AUD
$81.65 AUD $68.05 AUD
Per 5
View the product page first if you are unsure.
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Tungsten Carbide
Precision
AFBMA Grade 25
Hardness
91.5 Rockwell A
Properties
Extreme hardness and wear resistance.
Colour
Dull Grey
Metallic Balls - 3.175 mm Tungsten Carbide - AFBMA Grade 25 Ball
Material: Tungsten Carbide    Specific Gravity: 14.95   
Category: Balls - Metallic - Tungsten Carbide
Part Number: BL-00318-TC-G25 (PK-5) Metallic Balls - 3.175 mm Tungsten Carbide - AFBMA Grade 25 Ball
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
$4.54 AUD
$10.25 AUD $4.54 AUD
Per 5
Diameter (D)
3.175
mm
+/- 0.00254
(Equiv. 0.125 in.)
Material
Tungsten Carbide
Precision
AFBMA Grade 25
Hardness
91.5 Rockwell A
Metallic Balls - 3.175 mm Tungsten Carbide - AFBMA Grade 25 Ball
Material: Tungsten Carbide    Properties: Extreme hardness and wear resistance.    Colour: Dull Grey    Specific Gravity: 14.95   
Category: Balls - Metallic - Tungsten Carbide
Part Number: BL-00318-TC-G25 (PK-5) Metallic Balls - 3.175 mm Tungsten Carbide - AFBMA Grade 25 Ball
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
$4.54 AUD
$10.25 AUD $4.54 AUD
Per 5
Diameter (D)
3.175
mm
+/- 0.1270
(Equiv. 0.125 in.)
Material
Phosphor Bronze
Precision
AFBMA Grade 1000
Hardness
75-98 Rockwell B
Properties
Good corrosion resistance, widely used as an electrical conductor
Colour
Bronze
Metallic Balls - 3.175 mm Phosphor Bronze - AFBMA Grade 1000 Ball
Material: Phosphor Bronze    Specific Gravity: 8.4   
Category: Balls - Metallic - Phosphor Bronze
Part Number: BL-00318-PB-G1000 (PK-100) Metallic Balls - 3.175 mm Phosphor Bronze - AFBMA Grade 1000 Ball
13 units (1300 pcs) Available Now | Further orders can be expected around Wed, Sep 16, 2026
$28.86 AUD
$28.86 AUD
Per 100
Diameter (D)
3.175
mm
+/- 0.1270
(Equiv. 0.125 in.)
Material
Phosphor Bronze
Precision
AFBMA Grade 1000
Hardness
75-98 Rockwell B
Metallic Balls - 3.175 mm Phosphor Bronze - AFBMA Grade 1000 Ball
Material: Phosphor Bronze    Properties: Good corrosion resistance, widely used as an electrical conductor    Colour: Bronze    Specific Gravity: 8.4   
Category: Balls - Metallic - Phosphor Bronze
Part Number: BL-00318-PB-G1000 (PK-100) Metallic Balls - 3.175 mm Phosphor Bronze - AFBMA Grade 1000 Ball
13 units (1300 pcs) Available Now | Further orders can be expected around Wed, Sep 16, 2026
$28.86 AUD
$28.86 AUD
Per 100
View the product page first if you are unsure.
Diameter (D)
3.175
mm
+/- 0.0051
(Equiv. 0.125 in.)
Material
3.188

+/- 0.0051
(Equiv. 0.126 in.)
Precision
9.525

+/- 0.1270
(Equiv. 0.375 in.)
Hardness
2.383

+/- 0.0051
Checking Balls - 3.175x3.188x9.525 mm - Stainless Steel Ball
Material: Stainless Steel   
Category: Balls - Checking - Stainless Steel
Part Number: BCHK-00318-S440 (Each) Checking Balls - 3.175x3.188x9.525 mm - Stainless Steel Ball
Out of Stock | Backorder Now | Orders can be expected around Sun, Jul 26, 2026
$264.77 AUD
$264.77 AUD
Each
Diameter (D)
3.175
mm
+/- 0.0051
(Equiv. 0.125 in.)
Material
3.188

+/- 0.0051
(Equiv. 0.126 in.)
Precision
9.525

+/- 0.1270
(Equiv. 0.375 in.)
Hardness
2.383

+/- 0.0051
Checking Balls - 3.175x3.188x9.525 mm - Stainless Steel Ball
Material: Stainless Steel   
Category: Balls - Checking - Stainless Steel
Part Number: BCHK-00318-S440 (Each) Checking Balls - 3.175x3.188x9.525 mm - Stainless Steel Ball
Out of Stock | Backorder Now | Orders can be expected around Sun, Jul 26, 2026
$264.77 AUD
$264.77 AUD
Each
View the product page first if you are unsure.
Diameter (D)
3.175
mm
+/- 0.01270
(Equiv. 0.125 in.)
Material
304 Stainless
Precision
ISO 3290 Grade 100
Hardness
25-39 Rockwell C
Properties
Low magnetic permeability. Good corrosion resistance
Colour
Silver
Metallic Balls - 3.175 mm 304 Stainless - ISO 3290 Grade 100 Ball
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Specific Gravity: 7.916   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00318-S4-G100 (PK-100) Metallic Balls - 3.175 mm 304 Stainless - ISO 3290 Grade 100 Ball
448 units (44800 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$3.68 AUD
$3.68 AUD
Per 100
Diameter (D)
3.175
mm
+/- 0.01270
(Equiv. 0.125 in.)
Material
304 Stainless
Precision
ISO 3290 Grade 100
Hardness
25-39 Rockwell C
Metallic Balls - 3.175 mm 304 Stainless - ISO 3290 Grade 100 Ball
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80    Properties: Low magnetic permeability. Good corrosion resistance    Colour: Silver    Specific Gravity: 7.916   
Category: Balls - Metallic - Stainless Steel
Part Number: BL-00318-S4-G100 (PK-100) Metallic Balls - 3.175 mm 304 Stainless - ISO 3290 Grade 100 Ball
448 units (44800 pcs) Available Now | Further orders can be expected around Fri, Jul 31, 2026
$3.68 AUD
$3.68 AUD
Per 100
View the product page first if you are unsure.